CN109633333A - All kinds of cutting load amount collision detection of provincial and above power grid and coordinate method of calibration - Google Patents
All kinds of cutting load amount collision detection of provincial and above power grid and coordinate method of calibration Download PDFInfo
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Abstract
The invention discloses all kinds of cutting load amount collision detection of a kind of provincial and above power grid and coordinate method of calibration, to under the real-time grid method of operation, all types load shedding scheme is combed, to large capacity multi-infeed DC, under extensive new-energy grid-connected background, there are mismatches and deficient control risk to be analyzed and be assessed for load shedding strategy, this method can tight tracking power grid real time operation mode, configuration conflict between all kinds of cutting load information of quantitative analysis, the whether full-amount online judgement of control amount is carried out to power grid controlled amounts, and cutting load is carried out to forecast failure collection on this basis and is accurately simulated, accurately calculate the amount of collisions of cutting load, for management and running, personnel provide technical support.
Description
Technical field
The present invention relates to all kinds of cutting load amount collision detection of a kind of provincial and above power grid and coordinate method of calibration, belongs to electricity
Force system control technology field.
Background technique
The previous provincial and above power grid load shedding scheme is analyzed based on offline mode, carries out stability control equipment automatic load-reducing plan
It is slightly formulated with regulation load shedding prediction scheme, with operation of power networks side under large capacity multi-infeed DC, extensive new-energy grid-connected background
Formula is complicated and changeable, and load shedding strategy is there are mismatch and owes control risk.
The main formulation for considering safety and stability constraint and carrying out load shedding strategy of scheduling at different levels, second and third road defence line subtracts automatically
Load strategy, regulation emergency load shedding prediction scheme are independently formulated, and the unification for lacking the measure of multiclass load shedding effectively monitors and comprehensive association
Decision support is adjusted, there are mismatch and owes control risk.
Currently, needing to propose all kinds of cutting load amount collision detection of provincial and above power grid and method of calibration can be coordinated, use
In electric system on-line analysis and control.
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides that a kind of provincial and above power grid is all kinds of to be cut
Load collision detection and coordination method of calibration.
A kind of technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows: provincial and above power grid
All kinds of cutting load amount collision detection and coordination method of calibration, the specific steps are as follows:
Step 1: combing is provincial and above each voltage class of power grid can cutting load type, round information, specifying power grid can cut
Except load can be divided into following 5 class: 1. Millisecond responds, can be quickly by stable control device (referred to as peace is controlled) by the negative of round excision
Lotus belongs to second defence line；2. second grade response, can be by load control system (referred to as negative control) by the load of round excision；3. low
Frequency load-shedding equipment, low-voltage load sheding device meet the load cut off after operation condition by round, belong to three lines of defence；4. drawing of rationing the power supply
Accident, which is rationed the power supply, in the tagmeme table of road draws road load；Super power supply capacity is drawn in the tagmeme table of road to ration the power supply load 5. rationing the power supply；Every class is resectable
For load according to operation condition difference, excision timing difference is divided into a wheel or more wheel excisions.
Step 2: carrying out low-voltage-grade load extremely for system real-time working condition, the bus mode of connection, switch tool state
Power supply line's topological analysis, specifies 110kV route to the quantity of load curtailment (control load object) power supply, to being lower than
The load curtailment and load of 110kV voltage class, will according to power convert formula by its power supply line of topological analysis
The load curtailment amount of low-voltage-grade is converted to power supply line's performance number of 110kV voltage class.
Step 3: all kinds of load curtailments (control load object) cross-over configuration situation, system are analyzed according to current real-time working condition
Count all kinds of load curtailment measure amount of collisions, the specific steps are as follows:
3.1: analysis and Control load object belongs to the anti-line apparatus of second, load control system, three lines of defence device, thing
Therefore ration the power supply and draw road charge circuit, transfinite to ration the power supply which kind of control object in the charge circuit of road drawn, in the controllable amounts of all kinds of measures
It is how many；
3.1.1: when controlling load object and being controlled by the anti-line apparatus of second, it is more whether analysis and Control load object belongs to
A stable system strategy model is recognized when the same control load object belongs to two or more stable system strategy models
For this control load object, in the anti-line apparatus of second, there are configuration conflicts；
3.1.2: when control load object is controlled by three lines of defence device, whether analysis and Control load object belongs to
Low-frequency load shedding control object, and belong to low-voltage load sheding control object, when same control load object belongs to both the above control class
Type, then it is assumed that there are configuration conflicts in three lines of defence device for this control load object.
3.1.3: when control load object belong to ration the power supply draw road tagmeme table when, whether Statisti-cal control load object belongs to load
Control system or accident, which are rationed the power supply, draws road tagmeme table control object, when same control load object belongs to two or more control classes
When type, it is believed that this control load object draws road tagmeme table there are configuration conflicts rationing the power supply.
3.2: counting control load object conflict amount between the anti-line apparatus of multiple seconds, multiclass three lines of defence device
Between control load object conflict amount, the control load object conflict amount drawn between the tagmeme table of road of rationing the power supply；
3.3: statistics second defence line and three lines of defence control load object conflict amount, second defence line and ration the power supply and draw road
Tagmeme table control load object conflict amount, three lines of defence and the amount of collisions for drawing road tagmeme table control load object of rationing the power supply.
3.4: (can basis when any two control load object conflict amounts reach alarm threshold in step 3.2, step 3.3
Actual conditions setting), management and running personnel are reminded in alarm, there is control load object conflict.
Step 4: being directed to system real-time working condition, preset multiple catastrophe failure collection calculates each after analyzing forecast failure
Type load resection according to configuration conflict amount between each type load of most serious cutting load amount situation statistics, and calculates conflict ratio；
Step 5: being based on system real-time working condition, carry out simulation analysis to multiple catastrophe failure collection is preset, cut to all kinds of
Load measure is accurately simulated, after cutting off load, if still having safety and stability problem, and there are cutting load information configuration conflict,
Judge whether cutting load measure is full-amount, if insufficient, management and running personnel are reminded in alarm.
It is as follows not higher than the control load object Reduction of 110kV voltage class in the step 2:
2.1: if control load object is 110kV route, directly using line power as equivalent load；
2.2:, need to be according to control load object voltage V, wattful power if control load object is the following route of 110kV route
Rate P, reactive power Q, branch impedance parameter R+jX, calculate site power P on 110kV ', as load amount of collisions.
Each type load cross-over configuration situation is analyzed according to current real-time working condition in the step 3, amount of collisions calculates step such as
Under:
3.5: for the load of determining all types of load curtailments, according to the bus mode of connection and switch cutter in plant stand
Lock state carries out topological analysis, determines this type load curtailment user/route and other types load curtailment user/line
Road whether there is configuration conflict, and configuration conflict has referred to same 110kV and Above Transmission Lines public.
(1) control object amount of collisions between multiple anti-line apparatus of second is counted, between the device of multiclass three lines of defence
Control object amount of collisions, the control object amount of collisions drawn between the tagmeme table of road of rationing the power supply；It is anti-to count second defence line and third road
Line traffic control object conflict amount, second defence line and rationing the power supply draw road tagmeme table control object amount of collisions, three lines of defence and drawing of rationing the power supply
The amount of collisions of road tagmeme table control object.
The load that stable control device excision is respectively set is P1, the load of load control system excision is P2, low-frequency load shedding
Device, low-voltage load sheding device load curtailment are P3And P4, it is P that accident, which rations the power supply and draws road load,5, super power supply capacity load of rationing the power supply is
P6, setting round is k, and round sum is n, k ∈ n.PikRepresent i-th kind of kth wheel excision load, i ∈ (1,2,3,4,5,6).Example
Such as, if P1The load of stable control device excision is divided into 6 wheels, then is calculated as P respectively11-P16。
(2) for some anticipation catastrophe failure, the limited load of all kinds of measures of analogue simulation or negative control measure movement is cut, according to
Each type load acts precedence, all kinds of configuration of load amount of collisions is counted, for example, reaching stable control device after DC Line Fault
Quickly cut off big load user action condition, resection P1, about 400ms, which is acted, to be terminated；There are still cross section limits, according to load control
System second grade control excision load large user processed, former load control system second grade can the amount of cutting P2It need to subtract and P1Conflict the amount configured,
Its actual act load P’ 2For actual act load.
Its formula is as follows: setting stable load user Ke Qie amount as PlmIf second stage load user Ke Qie amount is P2k, by opening up
Analysis is flutterred, judges P2kWith PlmWhether a upper cable is shared, if sharing, by movement time-series, stability control equipment is first moved
Make, then negative control system is cut off after second grade, these two types of load amount of collisions be two classes share control object can the sum of the amount of cutting.Amendment
The practical control amount P of second grade afterwards’ 2=∑ P2k(k:1...n)-∑Plm(m:1...j).N is second stage load user Ke Qie total load number, and j is
Stable control object and the consistent load number of negative control system control object.
System real-time working condition data are directed in the step 4, preset multiple catastrophe failure collection calculates analysis anticipation
All kinds of load resection after failure determine configuration conflict amount and ratio between each type load according to most serious cutting load amount situation.
Certain type load conflict ratio=complete regional the type with act the former controllable total amount ╳ in amount of collisions/full area before
100%.
It is based on system real-time working condition in the step 5, simulation analysis is carried out to preset multiple catastrophe failure, to each
Class cutting load measure is precisely simulated, cut off load after, if there are still all kinds of safety and stability problems (apparatus overload, cross section limit,
Transient Instability, frequency are dangerous or voltage is dangerous etc.), then illustrate control measure deficiency, exports all kinds of cutting load information and match
Amount of collisions is set, management and running personnel are reminded in alarm.
The utility model has the advantages that all kinds of cutting load amount collision detection of provided by the invention provincial and above power grid and coordinating verification side
Method, under the real-time grid method of operation, all types load shedding scheme is combed, to large capacity multi-infeed DC, on a large scale
Under new-energy grid-connected background, there are mismatches and deficient control risk to be analyzed and be assessed for load shedding strategy, and this method can tight tracking
Power grid real time operation mode, the configuration conflict between all kinds of cutting load information of quantitative analysis carry out control amount to power grid controlled amounts
Whether in full amount online judgement, and cutting load is carried out to forecast failure collection on this basis and is accurately simulated, accurately calculate cutting load
Amount of collisions, for management and running, personnel provide technical support.
Detailed description of the invention
Fig. 1 is method flow schematic diagram of the invention.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figure 1, all kinds of cutting load amount collision detection of a kind of provincial and above power grid and coordinate method of calibration, it is specific to wrap
Include following steps:
Step 1 in Fig. 1: combing is provincial and above each voltage class of power grid can cutting load type, round information, specify power grid
Load curtailment can be divided into following 5 class: 1. Millisecond responds, and can quickly be cut off by stable control device (referred to as peace is controlled) by round
Load, belong to second defence line；2. second grade response, can be by load control system (referred to as negative control) by the load of round excision；
3. low frequency load shedding equipment, low-voltage load sheding device meet the load cut off after operation condition by round, belong to three lines of defence；4. limiting
Accident, which is rationed the power supply, in the tagmeme table of the road electricity La draws road load；Super power supply capacity is drawn in the tagmeme table of road to ration the power supply load 5. rationing the power supply.Every class can be cut
For the load removed according to operation condition difference, excision timing difference is divided into a wheel or more wheel excisions.
Every resectable load of class is as shown in table 1 according to operation condition or actuation time:
1 load curtailment classification of type table of table
The load that stable control device excision is respectively set is P1, the load of load control system excision is P2, low-frequency load shedding
Device, low-voltage load sheding device load curtailment are P3And P4, it is P that accident, which rations the power supply and draws road load,5, super power supply capacity load of rationing the power supply is
P6, setting round is k, and round sum is n, k ∈ n.PikRepresent i-th kind of kth wheel excision load, i ∈ (1,2,3,4,5,6).Example
Such as, if P1The load of stable control device excision is divided into 6 wheels, then is calculated as P respectively11-P16。
Step 2 in Fig. 1: being directed to real-time working condition data, based on topological analysis in 110kV and above plant stand, really
Determine load curtailment and power supply line's topological relation, determines each type load cross-over configuration situation under current working.
Step 3 is directed to system real-time working condition data in Fig. 1, and preset multiple catastrophe failure collection calculates analysis anticipation
All kinds of load resection after failure determine configuration conflict amount and ratio between each type load according to most serious cutting load amount situation,
Certain type load conflict ratio=complete regional the type with act the former controllable total amount ╳ 100% in amount of collisions/full area before.
Step 4 is based on system real-time working condition in Fig. 1, simulation analysis is carried out to preset multiple catastrophe failure, to each
Class cutting load measure is precisely simulated, cut off load after, if there are still all kinds of safety and stability problems (apparatus overload, cross section limit,
Transient Instability, frequency are dangerous or voltage is dangerous etc.), then illustrate control measure deficiency, exports all kinds of cutting load information and match
Amount of collisions is set, management and running personnel are reminded in alarm.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. all kinds of cutting load amount collision detection of a kind of provincial and above power grid and coordinating method of calibration, it is characterised in that: including such as
Lower step:
Step 1: combing is provincial and above each voltage class of power grid can cutting load type, round information, specify power grid can cut off it is negative
Lotus can be divided into following 5 class: 1. Millisecond responds, and the load of round excision can be quickly pressed by stable control device, belongs to second
Defence line；2. second grade response, can be pressed the load of round excision by load control system；3. low frequency load shedding equipment, low-voltage load sheding device
Meet the load cut off after operation condition by round, belongs to three lines of defence；Road is drawn 4. rationing the power supply and accident being drawn in the tagmeme table of road to ration the power supply
Load；Super power supply capacity is drawn in the tagmeme table of road to ration the power supply load 5. rationing the power supply；Every resectable load of class is cut according to operation condition difference
Except timing difference is divided into a wheel or more wheel excisions；
Step 2: carrying out low-voltage-grade load to power supply for system real-time working condition, the bus mode of connection, switch tool state
Line topological analysis, specifies the quantity that 110kV route is powered to load curtailment, to cutting off lower than 110kV voltage class
Load and load, by its power supply line of topological analysis, according to power convert formula, by the load curtailment of low-voltage-grade
Amount is converted to power supply line's performance number of 110kV voltage class；
Step 3: all kinds of load curtailment cross-over configuration situations being analyzed according to current real-time working condition, all kinds of load curtailments is counted and arranges
Apply amount of collisions；
Step 4: being directed to system real-time working condition, preset multiple catastrophe failure collection calculates all kinds of negative after analyzing forecast failure
Lotus resection according to configuration conflict amount between each type load of most serious cutting load amount situation statistics, and calculates conflict ratio；
Step 5: being based on system real-time working condition, simulation analysis is carried out to multiple catastrophe failure collection is preset, to all kinds of cutting loads
Measure is accurately simulated, after cutting off load, if still having safety and stability problem, and there are cutting load information configuration conflict, judgements
Whether cutting load measure is full-amount, if insufficient, management and running personnel are reminded in alarm.
2. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
Be characterized in that: every resectable load of class is divided into a wheel or more according to operation condition difference, excision timing difference in the step poly- 1
Wheel excision；It is as shown in table 1:
1 load curtailment classification of type table of table.
3. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
It is characterized in that: the step 3, the specific steps are as follows:
3.1: analysis and Control load object belongs to the anti-line apparatus of second, load control system, three lines of defence device, accident limit
The road electricity La charge circuit transfinites to ration the power supply which kind of control object in the charge circuit of road drawn, and is more in the controllable amounts of all kinds of measures
It is few；
3.1.1: when controlling load object and being controlled by the anti-line apparatus of second, whether analysis and Control load object belongs to multiple peaces
Steady system strategy model, when the same control load object belongs to two or more stable system strategy models, it is believed that this
Controlling load object, there are configuration conflicts in the anti-line apparatus of second；
3.1.2: when control load object is controlled by three lines of defence device, whether analysis and Control load object belongs to low frequency
Control of decreasing load object, and belong to low-voltage load sheding control object, when same control load object belongs to both the above Control Cooling, then
Thinking this control load object, there are configuration conflicts in three lines of defence device.
3.1.3: when control load object belong to ration the power supply draw road tagmeme table when, whether Statisti-cal control load object belongs to load control system
System or accident, which are rationed the power supply, draws road tagmeme table control object, when same control load object belongs to two or more Control Coolings
When, it is believed that this control load object draws road tagmeme table there are configuration conflicts rationing the power supply.
3.2: counting control load object conflict amount between the anti-line apparatus of multiple seconds, between the device of multiclass three lines of defence
Control load object conflict amount, the control load object conflict amount drawn between the tagmeme table of road of rationing the power supply；
3.3: statistics second defence line and three lines of defence control load object conflict amount, second defence line and ration the power supply and draw Lu Xuwei
Table control load object conflict amount, three lines of defence and the amount of collisions for drawing road tagmeme table control load object of rationing the power supply.
3.4: when any two control load object conflict amounts reach alarm threshold in step 3.2, step 3.3, alarm, which is reminded, is adjusted
Operations staff is spent, there is control load object conflict.
4. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
It is characterized in that: as follows not higher than the control load object Reduction of 110kV voltage class in the step 2:
2.1: if control load object is 110kV route, directly using line power as equivalent load；
2.2: if control load object be the following route of 110kV route, need to according to control load object voltage V, active-power P,
Reactive power Q, branch impedance parameter R+jX, calculate site power P on 110kV ', as load amount of collisions；
5. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
It is characterized in that: each type load cross-over configuration situation being analyzed according to current real-time working condition in the step 3, amount of collisions calculates step such as
Under:
3.5: for the load of determining all types of load curtailments, according to the bus mode of connection in plant stand and switch tool shape
State carries out topological analysis, determines this type load curtailment user/route and other types load curtailment user/route is
It is no there are configuration conflict, configuration conflict has referred to same 110kV and Above Transmission Lines public；
3.5.1: counting control object amount of collisions between the anti-line apparatus of multiple seconds, between the device of multiclass three lines of defence
Control object amount of collisions, the control object amount of collisions drawn between the tagmeme table of road of rationing the power supply；Count second defence line and three lines of defence
Control object amount of collisions, second defence line and rationing the power supply, which draw road tagmeme table control object amount of collisions, three lines of defence and ration the power supply, draws road
The amount of collisions of tagmeme table control object；
The load that stable control device excision is respectively set is P1, the load of load control system excision is P2, low-frequency load shedding dress
It sets, low-voltage load sheding device load curtailment is P3And P4, it is P that accident, which rations the power supply and draws road load,5, super power supply capacity ration the power supply load be P6,
Setting round is k, and round sum is n, k ∈ n；PikRepresent i-th kind of kth wheel excision load, i ∈ (1,2,3,4,5,6)；For example,
If P1The load of stable control device excision is divided into 6 wheels, then is calculated as P respectively11-P16；
3.5.2: for some anticipation catastrophe failure, the limited load of all kinds of measures of analogue simulation or negative control measure movement is cut, according to
Each type load acts precedence, all kinds of configuration of load amount of collisions is counted, for example, reaching stable control device after DC Line Fault
Quickly cut off big load user action condition, resection P1, about 400ms, which is acted, to be terminated；There are still cross section limits, according to load control
System second grade control excision load large user processed, former load control system second grade can the amount of cutting P2It need to subtract and P1Conflict the amount configured,
Its actual act load P '2For actual act load；Its formula is as follows:
If stable load user Ke Qie amount is PlmIf second stage load user Ke Qie amount is P2k, by topological analysis, judge P2kWith
PlmWhether a upper cable is shared, if sharing, by movement time-series, stability control equipment is first acted, and then negative control system exists
Cut off after second grade, these two types of load amount of collisions be two classes share control object can the sum of the amount of cutting；The second practical control amount of grade after amendment
P’2=∑ P2k(k:1...n)-∑Plm(m:1...j).N is second stage load user Ke Qie total load number, and j is stable control object and negative control
The consistent load number of system control object.
6. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
Be characterized in that: for system real-time working condition data in the step 4, it is pre- to calculate analysis for preset multiple catastrophe failure collection
Think all kinds of load resection after failure, determines configuration conflict amount and ratio between each type load according to most serious cutting load amount situation
Example, formula are as follows:
Certain type load conflict ratio=complete regional the type with act the former controllable total amount ╳ 100% in amount of collisions/full area before.
7. all kinds of cutting load amount collision detection of according to claim 1 provincial and above power grid and coordinate method of calibration,
It is characterized in that: based on system real-time working condition in the step 5, simulation analysis being carried out to preset multiple catastrophe failure, it is right
All kinds of cutting load measures are precisely simulated, and after cutting off load, if still having all kinds of safety and stability problems, illustrate control measure not
In full amount, all kinds of cutting load information configuration amount of collisions are exported, management and running personnel are reminded in alarm.
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| CN113346476A (en) * | 2021-04-23 | 2021-09-03 | 浙江华云电力工程设计咨询有限公司 | Load terminal device with multi-time scale control fusion and working method thereof |
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